Ratchet-drill.



nu. ammo. Patented mar. 2s, Ism. A. KERRY.

RATCIIET DRILL.

(Applict'ion led Oct. 1U, 1900.)

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UN'rnD STATES PATENT trice.

AARON KERRY, OF MARYSVILLE, MICHIGAN.

RATCHET-DRI LL.

SPECIFIGATION forming part of Letters Patent No. 670,710, dated March26, 1901.

Application tiled October 15, 1900. ySerial No. 33,110. (No model.)

To all whom it may concern.-

Beit known that I, AARON KERRY, a citizen of the United States, residingat Marysville, in the county of St. Clair and State of Michigan, haveinvented certain new and useful Improvements in Ratchet-Drills, of whichthe following is a specification, reference being had therein to theaccompanying drawings.

The invention has reference to an improved type of ratchet-drill; and itconsists in the peculiar construction thereof and in the novelarrangement and combination of its various parts, as will be fullyhereinafter described, and shown in the drawings, in which-V Figure lisavertical central section, partly in elevation. Figs. 2 and 3 aresections taken on lines and y fy, respectively, of Fig. l.

The reference-letter A designates the rotatable member of theratchet-drill, which is in the form of a vertical shaft the lower end ofwhich is provided with a socket a, adapted to receive the tool. Theupper portion C of the shaft is screw-threaded to receive thereon theusual feed-nut D.

B designates the ratchet-wheel, fixed in any suitable mannerto therotatable member, and E and F are two actuating-arms for rotating theWheel. In construction each arm is provided with a socket member, suchas Gr, which is centrally apertured to permit of its being swiveled uponthe rotatable member,as shown in Fig. 1, the socket mem-bers being soarranged relatively to each other as to form a housing for theratchet-wheel, as indicated.

H designates collars threaded upon the rotatable member bearing againstand holding in proper position'the socket members of the arms, and thesecollars may, if desired, be secured to the rotatable member by suitableset-screws. Vithin the socket member of each arm is formed a recess,such as eLin which is arranged a spring-impelled pawl I, which engagesthe ratchet-Wheel.

M is a bifurcated extension upon one of the arms, preferably the arm E,and K isa lever pivoted at c to swing between the furcations.

L is a dog arranged upon one arm of the lever adapted to be engaged uponthe movement of the latter with the feed-nut, and O represents a springarranged in a recess in the arm E, which bears normally against theopposite lever-arm and holds the dog normally out of engagement with thenut.

In operating the ratchet-drill the two actuating-arms are movedsimultaneously either away from or toward the operator. During themovement of the arms in one direction one of the latter engages theratchet-Wheel and partially rotates the same, while upon the returnmovement of the arms the ratchet is further rotated by the other arm. Bymeans of this construction the ratchet-Wheel is practically continuouslyrotated. 'To feed the tool held within the socket referred to to itswork, the operator while moving the actuating-arm presses the lever K,which causes the dog to engage with the feed-nut and rotates the latterindependently of the rotatable member. Thus the feeding is effectedWithout the necessity of the operator removing his hand from theactuating-arm.

What I claim as my invention is 1. In a ratchet-drill, the combinationwith a rotatable member and a feed device therefor, of an actuating-armfor turning the member, and means pivotally mounted in operativerelation to the feed for actuating the latter, said means including anoperating member extending into adjacency to the portion of theactuating-arm adapted to be grasped by the operator.

2. In a ratchet-drill, the combination with a rotatable member and afeed device therefor, of an actuating-arm for turning the member, andmeans pivotally mounted in operative relation to the feed for movementin a vertical plane, said means including an operating member extendinginto adjacency to the portion of the actuating-arm adapted to be graspedby the operator.

3. In a ratchet-drill, the combination with a rotatable member carryinga ratchet-Wheel thereon, an actuating-arm for turning the ratchet-wheel,a feed-nut upon the rotatable member, and means for turning the nutindependently of said member, comprising a dog arranged in operativerelation to the nut, and a lever controlling the dog extending inproximity to the actuating-arm and adapted to be actuated by the hand ofthe operator moving said arm.

4. In a ratchet-drill, the combination with IOO fr h Vi a rotatablemember carrying a ratchet-Wheel thereon, an actuating-arm for turningthe ratohet-wleel, a feed-nut upon the rotatable member, and means forturning the nut independently of said member, comprising a dog arrangedin operative relation to the nut and held normally out of engagementWith the latter, and a lever controlling the dog pivoted to theactuating-arm and adapted to be controlled by the hand of the operatormoving said arm, substantially as described.

5. In a ratchet-drill, the combination with a rotatable member, of aratchet-Wheel xed thereon, actuating-arms swiveled upon the rotatablemember upon opposite sides of the ratchet-Wheel, pawls carried by thearms engaging the ratchet-Wheel, a feed-nut threaded' Witnesses:

ROBERT C. CARLTON, NELSON D. ROBERTS.

